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Evaluate SQL expressions for zero

Akuna CapitalSoftware Engineer · Online Assessment
MediumSoftware EngineerOnline AssessmentData Manipulation (SQL/Python)

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This question evaluates understanding of SQL type coercion, boolean semantics, comparison operators, and dialect-specific evaluation behavior (for example, MySQL), focusing on interpreting expressions that may evaluate to zero.

Which of the following SQL expressions evaluate to 0? Evaluate each independently, justify the result, and note any dialect-specific behavior (e.g., MySQL type coercion rules):

  1. SELECT '0' = 0;
  2. SELECT 0 IS FALSE;
  3. SELECT '0' IS FALSE;
  4. SELECT STRCMP('0', 0). State your assumptions about the SQL dialect.